CN220943545U - Screw tap with spiral groove - Google Patents

Abstract

The utility model discloses a spiral fluted tap, which relates to the technical field of taps and comprises the following components: a tap body; a tapping part connected to one end of the tap body; a shank connected to the other end of the tap body; a first helical groove provided on the tapping portion; a second spiral groove arranged on the tool tip of the back tool surface of the tapping part; wherein, first helicla flute and second helicla flute intercommunication, the size of first helicla flute is greater than the size of second helicla flute. The utility model has the technical effects that the utility model can not only prevent the scraps from extruding the back knife surface, but also be used for accommodating scraps with smaller size.

Description

Screw tap with spiral groove

Technical Field

The utility model relates to the technical field of taps, in particular to a spiral fluted tap.

Background

The spiral fluted tap is an internal thread processing tool with spiral chip flutes, and is mainly used for processing internal threads of blind holes because the chip flutes are upwards.

The flute profile of the chip groove of relevant spiral fluted tap is single, and when the tool withdrawal, the sweeps easily produce the extrusion to the back of the body face to lead to the less sweeps of size to get into between spiral fluted tap and the waiting machined part, and then lead to the card bits, influence the life of spiral fluted tap, can lead to spiral fluted tap fracture even.

Disclosure of utility model

In view of the above technical problems, the present utility model provides a spiral fluted tap that can prevent the chips from pressing against the back face and can also be used to accommodate smaller sized chips.

In order to solve the problems, the technical scheme provided by the utility model is as follows:

a spiral fluted tap comprising:

a tap body;

a tap portion connected to one end of the tap body;

A shank portion connected to the other end of the tap body;

A first helical groove provided in the tapping portion;

A second spiral groove provided on the tip of the back blade surface of the tapping portion;

Wherein the first spiral groove is communicated with the second spiral groove, and the size of the first spiral groove is larger than that of the second spiral groove.

Optionally, the number of the first spiral grooves is equal to that of the second spiral grooves, and the first spiral grooves and the second spiral grooves are arranged in a one-to-one correspondence.

Optionally, the plurality of first spiral grooves and the plurality of second spiral grooves are uniformly distributed with respect to a circumference of the tapping portion.

Optionally, the tapping portion includes:

A cutting unit connected to one end of the tap body;

a calibration unit connected between the tap body and the cutting unit;

The cutting unit and the calibration unit are respectively provided with a first spiral groove, and the cutter point of the back cutter surface of the cutting unit and the cutter point of the back cutter surface of the calibration unit are respectively provided with a second spiral groove.

Optionally, the cross-sectional dimension of the cutting unit increases gradually along the direction from the calibration unit to the tap body.

Optionally, a cooling hole is formed through the tap portion, tap body and shank.

Optionally, a coating is also included on the tap.

Optionally, the coating is a nitride coating.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: because the size of first helical groove is greater than the size of second helical groove, be convenient for make first helical groove be the main tank, the second helical groove is the auxiliary tank, wherein, first helical groove is used for the chip removal, because the second helical groove is located on the knife tip of the back face of the tapping portion, when this helical groove screw tap is withdrawn the sword, the second helical groove is convenient for prevent that the bigger sweeps of size and back face from producing the extrusion, thereby prevent to produce more the smaller sweeps of size, and then prevent that more the smaller sweeps of size from getting into between this helical groove screw tap and the waiting for the machined part through the knife tip of back face, prevent the card bits, simultaneously the second helical groove still is used for holding the smaller sweeps of size, further prevent that the smaller sweeps of size from getting into between this helical groove screw tap and the waiting for the machined part through the knife tip of back face, prevent the card bits, guarantee the life of helical groove screw tap, prevent the helical groove screw tap fracture.

Drawings

FIG. 1 is a schematic view of a spiral fluted tap according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a spiral fluted tap according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of A-A of FIG. 2;

In the figure: 1. a tap body; 2. a tapping section; 21. a cutting unit; 22. a calibration unit; 23. a back knife surface; 24. a knife tip; 3. a handle; 4. a first helical groove; 5. a second helical groove; 6. and cooling holes.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.

Example 1

With reference to fig. 1-3, this embodiment provides a spiral fluted tap comprising:

A tap body 1;

a tapping portion 2 connected to one end of the tap body 1;

a shank 3 connected to the other end of the tap body 1;

A first helical groove 4 provided in the tapping portion 2;

a second helical groove 5 provided in the edge 24 of the back surface 23 of the tapping section 2;

wherein the first spiral groove 4 and the second spiral groove 5 are communicated, and the size of the first spiral groove 4 is larger than that of the second spiral groove 5.

Specifically, the tap body 1 is used for bearing the tapping part 2 and the handle part 3; the tapping part 2 is used for machining internal threads; the shank 3 is adapted to cooperate with an associated tapping device such that the spiral fluted tap cooperates with the associated tapping device; because the size of the first spiral groove 4 is larger than that of the second spiral groove 5, the first spiral groove 4 is a main groove, and the second spiral groove 5 is a secondary groove, wherein the first spiral groove 4 is used for removing chips, and because the second spiral groove 5 is arranged on the tool nose 24 of the back tool surface 23 of the tapping part 2, when the spiral groove tap is retracted, the second spiral groove 5 is convenient for preventing the large-size waste chips and the back tool surface 23 from being extruded, so that more small-size waste chips are prevented from being generated, more small-size waste chips are prevented from entering between the spiral groove tap and a to-be-machined part through the tool nose 24 of the back tool surface 23, and the clamping chips are prevented, meanwhile, the second spiral groove 5 is also used for accommodating the small-size waste chips, so that the small-size waste chips are prevented from entering between the spiral groove tap and the to-be-machined part through the tool nose 24 of the back tool surface 23, the service life of the spiral groove tap is ensured, and the spiral groove tap is prevented from being broken; it is noted that the second helical groove 5 has a size that lies between the size of the smaller sized scrap and the size of the larger sized scrap; it should be noted that smaller sized scraps are mainly generated at the time of tapping.

Further, as shown in fig. 3, the number of the first spiral grooves 4 and the second spiral grooves 5 are equal, and the first spiral grooves 4 and the second spiral grooves 5 are arranged in one-to-one correspondence.

Specifically, not only the tapping performance of the spiral fluted tap, but also the chip removal performance of the spiral fluted tap can be ensured, and as the first spiral flute 4 and the second spiral flute 5 are arranged in a one-to-one correspondence manner, the first spiral flute 4 and the second spiral flute 5 form a chip removal flute unit and remove chips together, wherein the specific number of the first spiral flute 4 and the second spiral flute 5 is not limited, and the number of the first spiral flute 4 and the second spiral flute 5 can be three, four and the like, and preferably three.

Further, as shown in fig. 3, the plurality of first helical grooves 4 and the plurality of second helical grooves 5 are uniformly distributed with respect to the circumferential direction of the tapping portion 2.

Specifically, the structural symmetry of the spiral fluted tap is convenient to increase, so that the stress symmetry of the spiral fluted tap is convenient to increase, and the tapping stability of the spiral fluted tap is convenient to increase.

Further, as shown in fig. 1 to 2, the tapping portion 2 includes:

a cutting unit 21 connected to one end of the tap body 1;

a calibration unit 22 connected between the tap body 1 and the cutting unit 21;

Wherein, the cutting unit 21 and the calibration unit 22 are respectively provided with a first spiral groove 4, and the cutting point 24 of the back knife surface 23 of the cutting unit 21 and the cutting point 24 of the back knife surface 23 of the calibration unit 22 are respectively provided with a second spiral groove 5.

Specifically, the cutting unit 21 is used for machining an internal thread; the calibration unit 22 is used for calibrating the internal thread, thereby increasing the machining accuracy of the internal thread.

Further, as shown in fig. 2, the cross-sectional dimension of the cutting unit 21 gradually increases in the direction from the calibration unit 22 to the tap body 1.

Specifically, it is convenient to bring the cutting unit 21 and the workpiece to be machined into contact gradually, so that the transition between the cutting unit 21 and the workpiece to be machined is good.

Further, as shown in fig. 1, the tap further includes a cooling hole 6 penetrating the tapping portion 2, the tap body 1, and the shank 3.

In particular, the cooling holes 6 are used to contain cooling fluid to facilitate internal cooling of the spiral fluted tap.

Further, a coating layer is provided on the tapping portion 2.

In particular, the coating serves to increase the wear resistance and service life of the tap 2.

Further, the coating is a nitride coating.

Specifically, the coating may be a titanium nitride coating, a titanium carbonitride coating, a titanium aluminum nitride coating, a chromium nitride coating, or the like.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (8)

1. A spiral fluted tap, comprising:

a tap body;

a tap portion connected to one end of the tap body;

A shank portion connected to the other end of the tap body;

A first helical groove provided in the tapping portion;

A second spiral groove provided on the tip of the back blade surface of the tapping portion;

Wherein the first spiral groove is communicated with the second spiral groove, and the size of the first spiral groove is larger than that of the second spiral groove.

2. The spiral fluted tap of claim 1 wherein the number of first spiral flutes and the number of second spiral flutes are equal, the first spiral flutes and the second spiral flutes being disposed in a one-to-one correspondence.

3. The spiral fluted tap of claim 2 wherein a plurality of the first spiral flutes and a plurality of the second spiral flutes are uniformly distributed about the circumference of the tap.

4. A spiral fluted tap according to any one of claims 1 to 3 wherein the tap portion includes:

A cutting unit connected to one end of the tap body;

a calibration unit connected between the tap body and the cutting unit;

The cutting unit and the calibration unit are respectively provided with a first spiral groove, and the cutter point of the back cutter surface of the cutting unit and the cutter point of the back cutter surface of the calibration unit are respectively provided with a second spiral groove.

5. The spiral fluted tap of claim 4 wherein the cutting element increases in cross-sectional dimension in the direction from the calibration element to the tap body.

6. A spiral fluted tap according to any one of claims 1 to 3 further including cooling holes through the tap portion, tap body and shank.

7. A spiral fluted tap according to any one of claims 1 to 3 further including a coating provided on the tap.

8. The spiral fluted tap of claim 7 wherein the coating is a nitride coating.